Need math help with a problem about possible outcomes

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A Social Security number has seven digits. How many Social Security numbers are possible?
A.
B.
C.
D.
E.
Nov 15th, 2015

Thank you for the opportunity to help you with your question!

A Social Security number has seven digits; every digit may be any one from 0 to 9.

Thus total number of possible permutations is =10x10x10x10x10x10x10=10^7

Answer is A

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 15th, 2015

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